Common PPARγ variants C161T and Pro12Ala are not associated with inflammatory bowel disease in an Australian cohort

Hume, G. E., Fowler, Elizabeth V., Griffiths, Lyn R., Doecke, J. D., & Radford-Smith, Graham L. (2012) Common PPARγ variants C161T and Pro12Ala are not associated with inflammatory bowel disease in an Australian cohort. Journal of Gastrointestinal and Liver Diseases, 21(4), pp. 349-355.

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Abstract

Background & Aims: Peroxisome proliferator-activated receptor (PPAR) γ is a transcription factor, highly expressed in colonic epithelial cells, adipose tissue and macrophages, with an important role in the regulation of inflammatory pathways. The common PPARγ variants C161T and Pro12Ala have recently been associated with Ulcerative Colitis (UC) and an extensive UC phenotype respectively, in a Chinese population. PPARγ Pro12Ala variant homozygotes appear to be protected from the development of Crohn's disease (CD) in European Caucasians. Methods: A case-control study was performed for both variants (CD n=575, UC n=306, Controls n=360) using a polymerase chain reaction (PCR)-restriction fragment length polymorphism analysis in an Australian IBD cohort. A transmission disequilibrium test was also performed using CD trios for the PPARγ C161T variant. Genotype-phenotype analyses were also undertaken. Results: There was no significant difference in genotype distribution data or allele frequency between CD and UC patients and controls. There was no difference in allele transmission for the C161T variant. No significant relationship between the variants and disease location was observed. Conclusions: We were unable to replicate in a Caucasian cohort the recent association between PPARγ C161T and UC or between PPARγ Pro12Ala and an extensive UC phenotype in a Chinese population. There are significant ethnic differences in genetic susceptibility to IBD and its phenotypic expression.

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ID Code: 63127
Item Type: Journal Article
Refereed: No
Keywords: Crohn's disease, Genetic polymorphism, Inflammatory bowel disease, PPAR?, Ulcerative colitis, peroxisome proliferator activated receptor gamma, allele, article, Australia, case control study, controlled study, Crohn disease, enteritis, gene frequency, genetic association, genetic polymorphism, genetic susceptibility, genotype phenotype correlation, haplotype map, human, major clinical study, polymerase chain reaction, restriction fragment length polymorphism, ulcerative colitis
ISSN: 1841-8724
Divisions: Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2012 Universitatea de Medicina si Farmacie "Iuliu Hatieganu"
Deposited On: 04 Oct 2013 00:38
Last Modified: 07 Nov 2013 05:23

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